Improvement in machines for desiccating tan



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Desiccating Tan.

\O.'I` 5,Q9Q.V PatenterdvFetg. 18,71873.

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N UNITED STATES PATENT OFFICE.

CHARLES H. MOSELEY, oF wINcEEsTEE, MASSACHUSETTS.

IMPROVEMENT I-N MACHINES FOR DESICCATING TAN.

Specification forming part of Letters Patent No.-135,999, dated February 18, 1873.

To all whom it may concern:

Beit known that I, CHARLES H. MosELEv, of`

Winchester, of the county of Middlesex and State of Massachusetts, have invented a new- .side elevations, and Fig. 4 a longitudinal section of such machine. Fig. 5 is a top view of its feeding and spreading roller.

In the said drawing, A represents the frame for supporting the operative parts of the machine, there being arranged within the frame, in manner as shown, an endless deliveryapron, B, supported by two rollers, C D. In advance of the endless apron is the feeding and spreading roller E, whose entire surface, in opposite directions from the middle, is groovedI helically or obliquely, as shown at a a., there being a' series of such grooves around the roller, the whole being so formed'as to cause the roller, while revolving over aforaminous plate or strainer, F, arranged as shown,

not only to advance or move forward the tan received from the endless apron, but to spread or aid in spreading it laterally in opposite directions over the strainer F, in order for the tan, preparatory to its entrance between the expressing-cylinders, to be evenly distributed across the plate. Below the strainer, and in advance of it and the feed-roller, is a hollow cylinder or drum, Gr, and directly over such drum is another hollow drum or roller, I-I, having its ljournals arranged in boxes b b to slide vertically within the frame. Over each box, and pivoted to the frame, is an elastic presser or lever, I, a rod, K, xed to the frame A being extended therefrom upward through the lever I, such rod being furnished at its upper part with a screw, o, and a lever screw-nut, d, screwed thereon, all being arranged as represented. The two expressing-cylinders G H, generally speaking, should be provided with v means of introducing into them either steam or hot air for heating them, or keeping them heated while they may be in use. They are connected by gears c j", fixed upon their journals at one side of the frame and engaging together.

0n the other side of the frame there is ixed to the journal of the lower expressing- `cylinder another gear, g, which engages with a pinion, lz., carried by a drivin g-sha-ft, t', such pinion being made to engage with a gear, 7c, fixed upon the shaft of the inner supportingroller of the endless apron. Furthermore, a gear, b, on the shaft of the feeding and spreading roller engages with the gear 7c, and is driven thereby. The directions of rotary motions of the several cylinders and rollers, when the machine is in operation, are indicated by arrows marked thereon. In advance of the lower expressing-cylinder is an inclined chute, L, which, composed of plate metal, has y beneath it a chamber, M, receiving steam or hot air for the purpose of heating the chute in order to enable it to aid in desiccating the tan while it may be passing down such chute.

The operation of the machine may be thus described: The tan, in its wet state, being thrown upon the upper surface of the endless apron, or into a hopper arranged over and so as to discharge upon such surface, will bc moved forward by the apron and be discharged upon the feed-roller, which, receiving the material, will carry and force it down upon the strainer and spread it in opposite' directions thereon, the liquor expressed or exuding from the tan being caused to drop through. the strainer or forainnous apron. From the latter the feed-roller will discharge the tan into the bite of the two cylinders Gr H. These cylinders, by their action upon the tan, will express from it most, if not all, of its remaining liquid, and at the same time heat the tan, so as to aid in effecting its desiccation. The liquid squeezed from the tan will generally escape throughthe strainer or down along the ends of thelower of the expressing-cylinders. From these cylinders the tan will be delivered upon the chute, and be caused by gravity and the action of the cylinders to descend the same, the tan being further heated during such passage over the chute, froni whence it will usually fall in a desiccated or nearly dried state, or one rendering it ht to be used as fuel, or for various other purposes.

My present machine differs materially from that described in Letters Patent No. 82,739, granted to me October 6, 1868, though the two are analogous in several respects. In mypreseut machine the expressing-cylinders, instead of being arranged with their axes in ahorizontal plane, have them disposed in a vertical plane, or so as to bring one cylinder directly over the other. Furthermore, in my present machine I have the strainer or foraminous plate and the feed-roller, they being arranged between the endless apron and the expressing-cylinders in manner and with respect t0 each other as explained and represented. Such feed-roller and strainer, operating together, and with the endless apron and the expressing-cylinders, as set forth, dier from anything in my former machine; besides, I have in my present machine the heating-chamber to the chute.

Instead ofthe endless delivery-apron, a hopper or chute may be substituted to receive the wet tan and deliver it to the feed-roller.

In the place of a grooved feed-roller, as described, a plain feed-roller, or one not grooved, may be used; but it will not spread the tan laterally so evenly upon the strainer for the introduction of the tan to the bite of the squeezing-cylinders as will the oblique-'grooved roller, as explained.

I claim as my invention in a talrdrier as describedl. The combination of a feed-roller, E, plain or grooved, and curved apron or strainer F, essentially as described, with the endless delivery-apron B, or its equivalent, and the expressing-cylinders G H, all being arranged and to operate substantially in manner as shown and set forth.

2. In the tan-desiccatin g machine, the chute L, as provided with the heating-chamber M, arranged under and against it, as and for the purpose explained.

C. H. MOSELEY.

Witnesses It. H. EDDY, J. R. SNOW. 

